Printing-telegraph.



L. CEREBOTANI.

PRINTING TELEGRAPH.

APPLICATION FILED APR.24. 1913.

1,168,603. Patented Jan. 18, 1916.

2 SHEETS-SHEET I- L. CEREBOTANI.

PRINTING TELEGRAPH; APPLICATION FILED APR. 24, I913.

1,168,603. Patented Jan. 18, 1916.

2 SHEETS-SHEET 2.

n s'rATEs PATENT OF C LUIGI GEREBOTANI, OF MUNICH, G'ERMANY, ASSIGNOR TO THE FIRM OF CARL ZEISS,

0F JENA, GERMANY. p

rnm'rme-rnnnenarrr.

Specification of Letters Patent.

Patented Jan. 18,1916.

Application fi1edAprii24, 1913. Serial No. 763,448;

To all whom it may concern citizen of Italy, residing at Munich, Germany, have invented a new and useful Pr nting-Telegraph, of which the following is a specification.

The present invention relates to the following three kinds of electrical type-pr nting telegraphic apparatus: The first kmd employ type-wheels, which are not only moved isochronously, but also synchronously at both end-stations, which movement is not controlled by current impulses, (but, for mstance, by clockwork) the impression of a type being operated by a line-current, which is closed by the depressed key, when at both end-stationsv the type runs past the paper band. The second kind makes use of an intermittent rotation of the type-wheels at both end-stations, such rotation taking place 'underthe influence of a current, WhlCh 11berates certain escapement wheels. This movement is operated by once switchmg in a special line-current at the transmitting station, before the telegraphic printing commences. On a key then being depressed, the movement stops, as soon as the corresponding type has reached the paper band (an impression being at the same tlmemade by the said type), on the key being released, however, the intermittent feed motlon recommences forthwith. The third kind valso makes use of an intermittentmotion of the type-wheels, but in such a manner that everything remains at rest, so long as none of the keys are depressed, and that by depressing any key the type-wheel is caused to go on rotating until the desired corresponding type is brought into its operative position. At this instant an impression of the type is made, an uncoupling takes place and the type-wheels snap back into theirinitial position. A new movement only ensues, when a key is again depressed. The main thing with all these kinds of type-printing telegraphic apparatusis the obtaining of consonance in the proceedings at the two end-stations. With thefirst' kind of apparatus the establishment of consonance in the position of the two type-wheels is in general effected by transmittm from one end-station to the other a certain chines r nning the while uninterruptedly, while the operator at the other end-station sets his clockwork and type-wheel in correcharacter, the ma spondence therewith. With the other kinds of apparatus consonance is established by the type-wheels automatically and simultaneously attaining the initial osition and stopping there, this occurring in the second kind after the completion of a certain number of rotatory motions, and in the third kind, as above explaine'd, immediately after an impression is obtained.- Just as with these last-named type-printing telegraphic apparatus the mode of the intermittent feed motion of the type-wheel is simple and sure, the obtaining of the consonance in question is very much more reliable, than is the case with the apparatus previously mentioned. It is, on the other hand, a drawback, that the twofold action, viz. the uncoupling and the snapping back of the type-wheel into its initial position for each letter makes a not .inconsiderable mechanical demand on the ap paratus, whereby the simplicity, stability and durability of the apparatus sufiers, while a certain loss of time is unavoidable, as slight as it may be. These drawbacks are obviated by the present invention.

The ,new mode of operation is derived from the third kind alluded to, it would, however, be easily adaptable. for the other two kinds, only unimportant modifications in the formof construction being required.

The peculiarity of the new arrangement con- .sists in the following: After an impression pression, but by rendering the said part'dependent on the acting of a special magnet,

only when, as was just which'magnet acts, indicated, a special key is depressed at one of the two end-stations.

In the annexed drawing: Figures 1 and 2 give a diagrammatic representation in two positions of a type-printing telegraphic apparatus, according to the'1nyention,Fig,. 3 shows a detail of the uncoupling mechanism,

F1 4 shows 'the printing magnet,Figs. 5 to? represent the mechanism for reestablishing the initial positions of the type wheel (Figs. 3 to 7 being drawn to an enlarged scale Figs. 8 and 9 show diagrammatically two different ways of connecting up the apparatus. In the following Figs. 1 to 7 shall be first explained. A shaft 8 is journaled rotatably Fig. 2, in which it is in its right-hand end position, the projecting piece 9 reaches in between a spring-controlled projection 11 and a stop 10, while with the sleeve positioned as in Fig. 1, in which it is in its lefthand end position, the projecting piece 9 is out of engagement with the parts 10 and 11. There is further fixed on the-sleeve 7 a disk 3, which has an indenture at the hottom 'of its periphery, and a disk 22, a toothed wheel 18 anda type-wheel 5. A rod 2 is pivoted at 14. An electromagnet 15, on being energized, draws the rod across to the left, while a spring serves for returning it to the right again. A printing magnet 6 is provided for pressing the p-aperztape by means of a roller 1 against the typewheel 5. A magnet 30 and an armature 32 serve for causing'a step by step rotation of the shaft8. The toothed wheel 18 engages with the teeth of a broad rack 17 which is displaceable on a bar 16 and is controlled by aspring 19. At one of its ends and on a portion of its breadth the rack is without teeth. At one side of the bar 16 aspringcontrolled locking lever is pivotally mounted, which is provided at the side facing the rack with a catch 20 and at the side facing the disk 22 with a projection21.

With the sleevein the position shown in Fig. 1 it is coupled by means of the pin 12 with the disk 13 and consequently with the shaft 8. When, during the working of the apparatus, the sleeve 7 carried around by the step by step motion of the shaft 8 has made a complete revolution in the direction opposite to the arrow shown in Fig. 7 the toothed'wheel 18has brought the rack in the direction of the arrow shown in Fig. 5' from the position given in Fig. 5 into that given in Fig. 6 and has by this means put the spring 19 in tension. The catch 20 then slips in behind the rack and prevents itsnapping back again. ,At the. termination of the movement of the rack the toothless part of the same has come below the toothed wheel, so that the latter along with the make further rotations,

type-wheel can v being further tensloned.

without the spring Should it be desired to return the typespring, to the left, the end of the rod passing under the disk 3, so that the rod takes up the position indicated by full lines in Fig. 2. On the current energizing the electromagnet 15 ceasing, the controlling spring draws the rod 2 toward the right again. On its return the rod-end rests against the disk 3 and pushes the sleeve along with the parts fixed to it to the right along the shaft 8, so that the pin 12 is withdrawn from the slot in the disk 13 and by this means the sleeve 7 and with it the type-wheel 5 is uncoupled from the shaft 8. By the displacement of the sleeve the toothed wheel 18 is brought into mesh with the teeth of the rack 17, while at the same time the disk 22 presses against the projection 21 of the locking lever and thereby causes the catch 20, to set the .rack 17 free. Through the tension of the spring 19jthe rack is caused to snap back into the position shown in Fig. 5. During this movement the rack rotates the toothed wheel'18and along with 1t the sleeve 7 in the opposite sense to its former direction of rotation. Finally, during the rotation of the sleeve the projecting piece 9 comes in contact with the spring controlled projection 11, is retarded by the latter, strikes the stop 10 and is prevented by the latter from rotatin farther. In this pos tion the type-wheel as again reached its 1n1t1al position. The rod 2 now stands exactly in front of the indenture of the disk 3. The disk 3 and with it the sleeve 7 is consequently no longer prevented from sliding along the shaft 8 to the left. This displacement is effected through the action of a spring not shown in the drawing, the pin 12 engages with the slot in the disk 13 and the coupling between the sleeve 7 and the shaft 8 is thus restored. By the displacement of the sleeve to the left the disk 22 has also moved awayfrom the projection 21, sothat the catch 20 is again able to slip behind the rack 17, when the latter has again reached, after a certain number of steps of the typewheel, the position shown in Fig. 6'.

A further innovation, which however does not belong to the essence of the invention,

is in so far provided in the present arrange- I ment, as the most frequently occurring types (numbering about 8 to 10) are fitted twice to the type-wheel at equal distances. Furthermore that part, which gives no impres sion and has only to cause the displacement of the paper for the necessary spaces, occurs frequently. The object of this arrangement is, that these types may be reached dur-. ing the intermittent feed .motion in the shortest possible 'time,.without having re: course to one of those well-known, to say the least troublesome arrangements, which bring about-the same result by effecting a displacement of the type-wheel.

The operation of the device shall now be explained with referenceto the circuit diagrams given as examples in Figs. 8 and 9.

In Fig. 8 the uncoupling is effected by the somewhat prolonged depression of any key, in F ig; 9, on the other hand, by the employment of a special current and by means of polarized relays. The fixed disks 24 and 25, which are composedof non-conducting materials, correspond to those bearing the same numbers in Fig. 1. The metal contact pieces 26 on disk 24 are insulated from each other and are each in metallic contact with one of the keys 27. The contact pieces 28 on the disk 25 are connected together and come in contact with the shaft 8, one after another, by means of a contact-maker 29 fixed on the shaft 8. A contact-maker 31 is fixed on the sleeve 7 and, on the latter rotating, connects the sleeve with the contact pieces 26 successively. The contact makers 29 and 31 are so positioned relatively to one another that, when the contact maker 29 lies on one of the contact pieces 28, the contact maker 31 lies between two of the contact pieces 26. A circuit closer 38 is so positioned that, on the upper end of the part 32 moving to the-left, contact is established between 38 and 32. When inthe arrangement according to'Fig. 8 any key 27'is depressed, a current is caused to flow from battery 33, over 8, 29, a contact piece 28, 34, 35, magnet 30, by way of line 36 to the other end-station, there over magnet 30, 35, 37, and back again by theearth to battery 33.

- This current automatically flows andis in- On the key remaining terrupted repeatedly through the rotation of 29 over 28, until 31 has reached the contact piece 26, which is connected with the depressed key. The current now no longer interrupts itself, as it finds between 8 and 35 a path over 31, 26 and the depressed key 27. rupted current at the circuit-closer 38 a local circuit is closed| (39, 38, 32, magnet'6, 40, 39), which causes an impression to be taken of the type set for. On' the depressed key being released the type-wheel will rotate forward by only half a step. On a second key being depressed a further intermittent feed motion commences and continues until the contact piece 26 corresponding to this key is reached by 31, and so on. depressed for some time, the above described procedure of the been perceived. On the key Now in consequence of the uninter-' reestablishment of the initial position will be inaugurated at both end-stations. 1s brought about in the following manner:

This

The electromagnet 15 is constituted in the WQllfkIlOWIl manner, elapses, before it acts,

that a certain periodand is connected up.

in a circuit (deriving its current either as lish the initial position, the key must remain depressed for some time, by-which means,

' besides the line-circuit from 33 and the local circuit 39, 6, 32, 39, the other local circuit 39,15, 32,38, 39, remains closed for as long as the key remains depressed. This is done in order to make sure that the same is happening at the other end-station, for a short time after the acting of the magnet 15 has rising, these circuits are opened and at both end-stations the initial lposition is at once reestablished, as was exp ained.

The connection according. to Fig. 9 is more complicated,;but will be more suitable in most cases. 1 In this case there are used in addition a second oppositely directed linecurrent source 41, two polarized relays 42 and 43 and a key 44, which latter has the purpose of switching in 41 and at the same time switching off the earth connection. The relation of the printing magnet 6 to the intermittent feed motion magnet 30 remains unaltered, as was explained in connection with Fig. 8. The uncoupling magnet 15 is, on the other hand, solely dependent on the relay 43, a. sit only acts, when 43 has acted. Magnet 30 as well is controlled by a relay 42 and is connected up in a local circuit.- The two delays 42 and 43 are connected in the long distance line in series and \Vhile one of them,

relay 42, 45, 35, 37, and back again by the .earth to 33, then 42-,alone acts at both endstations and switches in the local circuit 30, 4c, 47, 4s, 30.

from 33 interruptsitselfat the disk 25, so that 30 again becomes" currentless, which again results in a closing of thecircuit from 33', and so on. sleeve with its parts is the same as explained Consequently the current The further action of the this means there results a current from the battery 41 having the following course: l, 49, 45,- rel-a'y' (l2, relay 43, by way of the line 36 totheother end-station, there over relay 43, relay42, 45,35,137, and back again by the earth'to l1. On -this current flowing there acts,fas' indicated above,- at both endstations only the relay43, sothat now the circuit containing-"15 is closed, 'viz., the circuit 39', magnet 15, 50, 51', 39. 'The reestablishment of he initial position at both endstations is thus again inaugurated.

I claim: I I 1. In an electrical type-printing telegraph a transmitting apparatus comprising a set of keys, only-one rotatable type-,wheel and means for causing the depression of the said keys to result in the making of impressions of the said types, means for causing the type-wheel to be brought backfrom any position into its initial position and a special key for operating the said latter means and receiving apparatus comprising similar parts to thcseof the said transmitting apparatus, adapted to coact simultaneously with those parts.

2. In an electrical type-printing telegraph 1altransmitting apparatus comprising a set of eys, ed on the said shaft, means whereby the type-wheel is adapted to. be coupled with the said shaft and other means for causing the depression of the said keys to result in the making of impressions of the said types, a special key, asource of current controlled by the said key, an electromagnet capable of being energized by the said current and adapted to uncouple thetype-wheel from its shaft, a sprlngradapted to be put-in tension by the rotatory'motion of the said type-wheel and quickly to return-the type-wheel from any position into its initialposition and-res ceiving apparatus comprising similar parts to those of the saidtransmitting apparatus,

adapted to coact simultaneously with those parts.

' l 3. Inan electrical type-printing telegraph atransmitting apparatus comprising a set of keys, a rotatable shaft, a type wheel mounted on the said shaft, means whereby the typewheel is adaptedtobe coupled with the said shaft. and other means, forcausing the depression ofgthe' said keys'to result: in .the.

making of impressions of the saidtypes, a specialkey, a source of current controlled by an electromagnet capable of being energized by the said current and adapted to uncouple the type-wheel from its shaft, a spring adapted tobe put in ten a rotatable shaft, a type-wheel mountcontaining the said electroma sion by the rotatory motion of the said typewheel and quickly to return the type-wheel from any position into itsinitial position a spring-controlled stop adapted to prevent the type-wheelfrom recoiling at the end of its quick return and receiving apparatus comprising similar partsgto those of the said transmitting apparatus adaptedto coact simultaneously with 1 those, parts.

4. In an electrical type-printing telegraph a transmitting apparat s comprlsing a set of keys, a rotatable shaft, a sleeve rotatable and s'lida'bleon this "shaft, means whereby be coupled with the the" sleeve is adapted to fixed on the said said shaft, a type-wheel sleeve, a toothed wheel fixed on the said,

from its shaft, a spring adapted to be put in tension by the rotatory motion of the said type-wheel and quickly to return the type-wheel from any position into its initial position, a spring-controlled stop adapted to prevent the type-wheel from recoiling atthe end of its quick return and receiving apparatus comprising similar parts to those'of the said transmitting apparatus, adapted to coact simultaneously with those parts.

5. In an electrical type-printing telegraph a transmitting apparatus-comprising a set of keys, a rotatable shaft, asleeve rotatable and slidable on this shaft, means whereby the sleeve is adapted to be coupled with the said shaft, a type-wheel fixed on the said sleeve, a toothed wheel fixed on the said sleeve, alongi tudinally slidable and springc'ontroll'd rack adapted to mesh with the said toothed wheel and having a portion of some of its teeth missing, means for stopping the motionof the said rack, means for causing the depression of the said keys to result in the making of impressions of the said types, a special key, a source of current ,controlled by thesaid key an electromagnet capable of being energized by the said current and adapted to uncouple the sleeve from its shaft, ;a spring adapted to be put in tension-by the rotatory motion of the said type-wheel and quickly to return the type-wheel from any position into its initial position, a line-battery adapted to be put in circuit by the said' specialkey and to cause a current to flow, a relay adapted to act on this current flowing and to close the circuit et, a second relay connected up with the rst relay, but

operated'with reversed polarity, and adapted to act, on any key of the said set of keys being depressed a second battery adapted to be put in circult in place of the said linebattery and to cause a current to How in the opposite direction to the current from the -said line-battery and to cause the said second relay to act, and receiving apparatus comprising similar parts to those of the said transmitting apparatus, adapted to coact simultaneously with those parts.

6. In an electrical type-printing telegraph a transmitting apparatus, comprising a set of keys, a rotatable type wheel and means for causing thedepression of the said keys to result in the making ofimpressions of the said types, means for causing the type-Wheel to be brought back from any position into its initial position and means adapted to operate the said latter means when any key 20 .is depressed for a somewhat longer time-and receiving apparatus compr sing slmilar parts to those of the said transmittixzg apparatus, adapted to coact slmultaneou those parts.

DR. LUIGI CEREBOTANI."

Witnesses PAUL KRt'ieER, FRITZ LANDER.

Copies of this patent may be obtained for five cents each, by addressing the "Gommissipner of Patents, Washington, D. 0. p 

